70W HPS bulb on 230V mains with No Ballast - Just trips the MCB :(

[ericmark]

Does it matter? Over the years I have cleaned out the different vans or cars and the garage has gained MCB's, bulbs, and other junk which should have really been binned, but I thought it may come in use full. Some with books full Lucas Workshop manual but I have not worked on vehicle electrics for 25 years. Some I have given away to good homes, but only people working on vintage cars would want most of the car books, and electrics are worse who wants a 15th edition on site guide? Normally the week after it goes in the bin some one asks if I have one.

 

[eveares]

Don't be surprised if the ignitor has welded it's contacts together.

It indeed has, bulb has now gone to a dead short.

 

[ban-all-sheds]

You'd need to get to photonicinduction levels of silliness to blow them up

Colin Furze could be a contender, maybe?

 

[ban-all-sheds]

So today I did a little experiment and thought I would see what would happen...

"So" is a linking conjunction.

If it would have made no sense, and been obviously wrong for you to have written

And today I did a little experiment and thought I would see what would happen...

or

But today I did a little experiment and thought I would see what would happen...

Then it was equally senseless and wrong to have started with the word "So".

 

[Iggifer]

Some grammar corrections

Don't even get me started. I have to bite my tongue (fingers?) every time. What seems to be the only pronoun he uses.

 

[EFLImpudence]

He must have been born during the great that and which shortage.

 

[Spark123]

Don't be surprised if the ignitor has welded it's contacts together.

It indeed has, bulb has now gone to a dead short.

Same thing happens when you put some SON I lamps in fittings with external ignitors.

 

[Iggifer]

He must have been born during the great that and which shortage.

What one was that?

 

[eveares]

Don't even get me started. I have to bite my tongue (fingers?) every time. What seems to be the only pronoun he uses.

Are you referencing me? This is not a English literature forum is it....

 

[ban-all-sheds]

No, it isn't.

It isn't even an English language one.

But some excrescences are so egregious that they earn excoriation.

 

[eveares]

Just a few photos of the 70W HPS bulb with the dead internal ignitor. Does anyone know what the little square tab thing is as pointed out by the red arrow in the 2nd photo. I also take it the bit of glass as shown by the blue arrow in the 3rd photo is just left over from the manufacturing process and has no role in the bulbs operation.

View 1:

70w SON-E I HPS Bulb - View 1

• eveares
• 6 Jun 2016

View 2:

70w SON-E I HPS Bulb - View 2

• eveares
• 6 Jun 2016

View 3:

70w SON-E I HPS Bulb - View 3

• eveares
• 6 Jun 2016

 

[Echo the husky]

The square part is the 'getter' and when it is activated during manufacture it helps absorb any gasses remaing in the envelope after evacuation. See here.